Anatomy and life drawing, dude. Before you draw a woman clothed, you gotta draw her nekkiddddd.
Nudity (but for artistic purposes!!!):
A woman's hips and arms aren't straight like in your Nazi lady. You've also got hairy line syndrome. Try to be more in control of your lines. And work on the faces! Pick up How to Draw Comics the Marvel Way. It's the perfect stepping stone for a beginner.
The Hype isn't really the best place for fan-art critique. Go to conceptart.org, start a sketchbook, and people will feed you some nice critiques (seriously, they're nice!).
Draw everyday, study anatomy, and you'll see some improvement. Good luck!